Just noticed this strange thing!

For the last 12 years, we've had an aneroid barometer hanging in the
hall - it's probably 1930's by the look of it, and the top half of the
dial is printed in black text, and the bottom in red. I've just noticed
the the bottom half has disappeared! If you look at it from an oblique
angle, you can see the print, but it has faded to nothing!. The device
is in a really dark nook, getting no natural light, and for at least the
last 5 years the area is lit 24/7 by a lamp on a bureau - some 18" away
(Philips compact fluorescent for the last 3 years or so). The lamp has a
fabric shade, and the barometer's dial has a glass cover. It's not
something that I look at in detail every day - I've got the internet for
the weather ;-), but I know that I calibrated it a couple of years ago &
didn't notice any problem..

Any insight?

Cheers, Bramblestick

On 08/01/2012 21:03, Bramblestick wrote:
Just noticed this strange thing!

For the last 12 years, we've had an aneroid barometer hanging in the
hall - it's probably 1930's by the look of it, and the top half of the
dial is printed in black text, and the bottom in red. I've just noticed
the the bottom half has disappeared! If you look at it from an oblique
angle, you can see the print, but it has faded to nothing!. The device
is in a really dark nook, getting no natural light, and for at least the
last 5 years the area is lit 24/7 by a lamp on a bureau - some 18" away
(Philips compact fluorescent for the last 3 years or so). The lamp has a
fabric shade, and the barometer's dial has a glass cover. It's not
something that I look at in detail every day - I've got the internet for
the weather ;-), but I know that I calibrated it a couple of years ago &
didn't notice any problem..

Any insight?

Cheers, Bramblestick

Not quite sure but red in past years was prone to fading, modern paints
are better but as your item was painted way back I would have expected
some fading, now linked to fluorescent rays there maybe an accelerator
in there somewhere and at 18" away and probably some heat damage over a
long period.
Red in hair dyes even today is the most prone to colour fade. red cars
in the 70s 80s used to fade quite quickly as well.

So I think red will fade but something has accelerated it and I suspect
the fluorescent light.

On Sun, 08 Jan 2012 21:03:56 +0000, Bramblestick wrote:

The device is in a really dark nook, getting no natural light, and for
at least the last 5 years the area is lit 24/7 by a lamp on a bureau -
some 18" away (Philips compact fluorescent for the last 3 years or so).

I think CFL's push out rather more than just visible light. Not high
levels of UV but enough over a long period of time to affect things

--
Cheers
Dave.

On 8 Jan,
Bramblestick wrote:

Just noticed this strange thing!

For the last 12 years, we've had an aneroid barometer hanging in the
hall - it's probably 1930's by the look of it, and the top half of the
dial is printed in black text, and the bottom in red. I've just noticed
the the bottom half has disappeared! If you look at it from an oblique
angle, you can see the print, but it has faded to nothing!. The device
is in a really dark nook, getting no natural light, and for at least the
last 5 years the area is lit 24/7 by a lamp on a bureau - some 18" away
(Philips compact fluorescent for the last 3 years or so). The lamp has a
fabric shade, and the barometer's dial has a glass cover. It's not
something that I look at in detail every day - I've got the internet for
the weather ;-), but I know that I calibrated it a couple of years ago &
didn't notice any problem..

Any insight?

UV light. Fluorescents (of any type, cfl or long tube) are notorious for
causing the fading you mention.

--
B Thumbs
Change lycos to yahoo to reply

On Jan 8, 9:03*pm, Bramblestick wrote:
Just noticed this strange thing!

For the last 12 years, we've had an aneroid barometer hanging in the
hall - it's probably 1930's by the look of it, and the top half of the
dial is printed in black text, and the bottom in red. I've just noticed
the the bottom half has disappeared! If you look at it from an oblique
angle, you can see the print, but it has faded to nothing!. The device
is in a really dark nook, getting no natural light, and for at least the
last 5 years the area is lit 24/7 by a lamp on a bureau - some 18" away
(Philips compact fluorescent for the last 3 years or so). The lamp has a
fabric shade, and the barometer's dial has a glass cover. It's not
something that I look at in detail every day - I've got the internet for
the weather ;-), but I know that I calibrated it a couple of years ago &
didn't notice any problem..

Any insight?

Cheers, Bramblestick


As we are now in 2012, you can expect these strange things.
The world is due to end on 21 12 2012 as the Maya calendar runs out.
Or something of the sort.

I find that hard to believe considering the low lux levels involved. Other
ideas, when it was calibrated, was it removed or cleaned? Could it be that
the damage was there but some kind of recent shock or trauma has made
brittle paint simply fall away?

Brian

--
Brian Gaff -
Note:- In order to reduce spam, any email without 'Brian Gaff'
in the display name may be lost.
Blind user, so no pictures please!
"ss" wrote in message
...
On 08/01/2012 21:03, Bramblestick wrote:
Just noticed this strange thing!

For the last 12 years, we've had an aneroid barometer hanging in the
hall - it's probably 1930's by the look of it, and the top half of the
dial is printed in black text, and the bottom in red. I've just noticed
the the bottom half has disappeared! If you look at it from an oblique
angle, you can see the print, but it has faded to nothing!. The device
is in a really dark nook, getting no natural light, and for at least the
last 5 years the area is lit 24/7 by a lamp on a bureau - some 18" away
(Philips compact fluorescent for the last 3 years or so). The lamp has a
fabric shade, and the barometer's dial has a glass cover. It's not
something that I look at in detail every day - I've got the internet for
the weather ;-), but I know that I calibrated it a couple of years ago &
didn't notice any problem..

Any insight?

Cheers, Bramblestick

Not quite sure but red in past years was prone to fading, modern paints
are better but as your item was painted way back I would have expected
some fading, now linked to fluorescent rays there maybe an accelerator in
there somewhere and at 18" away and probably some heat damage over a long
period.
Red in hair dyes even today is the most prone to colour fade. red cars in
the 70s 80s used to fade quite quickly as well.

So I think red will fade but something has accelerated it and I suspect
the fluorescent light.

ss wrote:
On 08/01/2012 21:03, Bramblestick wrote:
Just noticed this strange thing!

For the last 12 years, we've had an aneroid barometer hanging in the
hall - it's probably 1930's by the look of it, and the top half of the
dial is printed in black text, and the bottom in red. I've just noticed
the the bottom half has disappeared! If you look at it from an oblique
angle, you can see the print, but it has faded to nothing!. The device
is in a really dark nook, getting no natural light, and for at least the
last 5 years the area is lit 24/7 by a lamp on a bureau - some 18" away
(Philips compact fluorescent for the last 3 years or so). The lamp has a
fabric shade, and the barometer's dial has a glass cover. It's not
something that I look at in detail every day - I've got the internet for
the weather ;-), but I know that I calibrated it a couple of years ago &
didn't notice any problem..

Any insight?

Cheers, Bramblestick

Not quite sure but red in past years was prone to fading, modern paints
are better but as your item was painted way back I would have expected
some fading, now linked to fluorescent rays there maybe an accelerator
in there somewhere and at 18" away and probably some heat damage over a
long period.
Red in hair dyes even today is the most prone to colour fade. red cars
in the 70s 80s used to fade quite quickly as well.

So I think red will fade but something has accelerated it and I suspect
the fluorescent light.


its the UV from the compact fluorescent that's ****ed it.

On Mon, 09 Jan 2012 09:03:34 +0000, Terry Fields
wrote:


Bramblestick wrote:

Just noticed this strange thing!

For the last 12 years, we've had an aneroid barometer hanging in the
hall - it's probably 1930's by the look of it, and the top half of the
dial is printed in black text, and the bottom in red. I've just noticed
the the bottom half has disappeared! If you look at it from an oblique
angle, you can see the print, but it has faded to nothing!. The device
is in a really dark nook, getting no natural light, and for at least the
last 5 years the area is lit 24/7 by a lamp on a bureau - some 18" away
(Philips compact fluorescent for the last 3 years or so). The lamp has a
fabric shade, and the barometer's dial has a glass cover. It's not
something that I look at in detail every day - I've got the internet for
the weather ;-), but I know that I calibrated it a couple of years ago &
didn't notice any problem..

Any insight?

Cheers, Bramblestick

In the 'Chernobyl' thread above someone gave a link to a radon
radiation web site, which also contained a link to this, which you
might find interesting:

http://www.hpa.org.uk/Topics/Radiati...v_UvFromLamps/

...which concerns some health risks from CFLs.

Terry Fields

There's an interesting piece about airport backscatter imaging on that
site that puts the perceived hazard into perspective, by comparing it
with the cosmic radiation exposure in the ensuing flight.



--
Graham.
%Profound_observation%

On 08/01/2012 21:03, Bramblestick wrote:
Just noticed this strange thing!

For the last 12 years, we've had an aneroid barometer hanging in the
hall - it's probably 1930's by the look of it, and the top half of the
dial is printed in black text, and the bottom in red. I've just noticed
the the bottom half has disappeared! If you look at it from an oblique
angle, you can see the print, but it has faded to nothing!. The device
is in a really dark nook, getting no natural light, and for at least the
last 5 years the area is lit 24/7 by a lamp on a bureau - some 18" away
(Philips compact fluorescent for the last 3 years or so). The lamp has a
fabric shade, and the barometer's dial has a glass cover. It's not
something that I look at in detail every day - I've got the internet for
the weather ;-), but I know that I calibrated it a couple of years ago &
didn't notice any problem..

Any insight?

Cheers, Bramblestick

Others have mentioned UV, but some red inks as found in hand drawn maps,
legal documents, etc. fade faster than the black even in the absence of
light. Probably oxidation.

Newshound wrote:
On 08/01/2012 21:03, Bramblestick wrote:
Just noticed this strange thing!

For the last 12 years, we've had an aneroid barometer hanging in the
hall - it's probably 1930's by the look of it, and the top half of the
dial is printed in black text, and the bottom in red. I've just noticed
the the bottom half has disappeared! If you look at it from an oblique
angle, you can see the print, but it has faded to nothing!. The device
is in a really dark nook, getting no natural light, and for at least the
last 5 years the area is lit 24/7 by a lamp on a bureau - some 18" away
(Philips compact fluorescent for the last 3 years or so). The lamp has a
fabric shade, and the barometer's dial has a glass cover. It's not
something that I look at in detail every day - I've got the internet for
the weather ;-), but I know that I calibrated it a couple of years ago &
didn't notice any problem..

Any insight?

Cheers, Bramblestick

Others have mentioned UV, but some red inks as found in hand drawn maps,
legal documents, etc. fade faster than the black even in the absence of
light. Probably oxidation.

I printed some inkjet decals and left em on a window sill half obscured
by an ornament.

In the shade they stayed red. In sunlight with UV they were wiped out
red wise.

Its something in that particular red dye.

On Jan 10, 2:15*am, The Natural Philosopher
wrote:
Newshound wrote:
On 08/01/2012 21:03, Bramblestick wrote:
Just noticed this strange thing!

For the last 12 years, we've had an aneroid barometer hanging in the
hall - it's probably 1930's by the look of it, and the top half of the
dial is printed in black text, and the bottom in red. I've just noticed
the the bottom half has disappeared! If you look at it from an oblique
angle, you can see the print, but it has faded to nothing!. The device
is in a really dark nook, getting no natural light, and for at least the
last 5 years the area is lit 24/7 by a lamp on a bureau - some 18" away
(Philips compact fluorescent for the last 3 years or so). The lamp has a
fabric shade, and the barometer's dial has a glass cover. It's not
something that I look at in detail every day - I've got the internet for
the weather ;-), but I know that I calibrated it a couple of years ago &
didn't notice any problem..

Any insight?

Cheers, Bramblestick

Others have mentioned UV, but some red inks as found in hand drawn maps,
legal documents, etc. fade faster than the black even in the absence of
light. Probably oxidation.

I printed some inkjet decals and left em on a window sill half obscured
by an ornament.

In the shade they stayed red. In sunlight with UV they were wiped out
red wise.

Its something in *that particular red dye.- Hide quoted text -

- Show quoted text -

I seem to remember that just about all the bright red pigments and
dyes that you could make reasonably inexpensive paints and printing
inks from were prone to fading in light, or chemically by reacting
with air, or toxic - or some combination of the three, although this
may have improved in recent years. On the other hand, carbon black was
(and is) commonly used as the pigment in black paints and printing
inks, and is very stable, as are various black, brown and yellow
pigments based on Iron oxide. I've seen lots of dials where red
printing has faded while the black is as good as new, even when they
were only in indirect sunshine - so a fluorescent lamp only 18 inches
away could possibly have the same effect.

docholliday wrote:
On Jan 10, 2:15 am, The Natural Philosopher
wrote:
Newshound wrote:
On 08/01/2012 21:03, Bramblestick wrote:
Just noticed this strange thing!
For the last 12 years, we've had an aneroid barometer hanging in the
hall - it's probably 1930's by the look of it, and the top half of the
dial is printed in black text, and the bottom in red. I've just noticed
the the bottom half has disappeared! If you look at it from an oblique
angle, you can see the print, but it has faded to nothing!. The device
is in a really dark nook, getting no natural light, and for at least the
last 5 years the area is lit 24/7 by a lamp on a bureau - some 18" away
(Philips compact fluorescent for the last 3 years or so). The lamp has a
fabric shade, and the barometer's dial has a glass cover. It's not
something that I look at in detail every day - I've got the internet for
the weather ;-), but I know that I calibrated it a couple of years ago &
didn't notice any problem..
Any insight?
Cheers, Bramblestick
Others have mentioned UV, but some red inks as found in hand drawn maps,
legal documents, etc. fade faster than the black even in the absence of
light. Probably oxidation.
I printed some inkjet decals and left em on a window sill half obscured
by an ornament.

In the shade they stayed red. In sunlight with UV they were wiped out
red wise.

Its something in that particular red dye.- Hide quoted text -

- Show quoted text -

I seem to remember that just about all the bright red pigments and
dyes that you could make reasonably inexpensive paints and printing
inks from were prone to fading in light, or chemically by reacting
with air, or toxic - or some combination of the three, although this
may have improved in recent years. On the other hand, carbon black was
(and is) commonly used as the pigment in black paints and printing
inks, and is very stable, as are various black, brown and yellow
pigments based on Iron oxide. I've seen lots of dials where red
printing has faded while the black is as good as new, even when they
were only in indirect sunshine - so a fluorescent lamp only 18 inches
away could possibly have the same effect.

Reds are notorious for UV fading.

Especially organic pigments.

http://www.paintmaking.com/red.htm

Its no bad idea to put a UV barrier lacquer over reds..apparently.

On Jan 10, 2:20*pm, The Natural Philosopher
wrote:
docholliday wrote:
On Jan 10, 2:15 am, The Natural Philosopher
wrote:
Newshound wrote:
On 08/01/2012 21:03, Bramblestick wrote:
Just noticed this strange thing!
For the last 12 years, we've had an aneroid barometer hanging in the
hall - it's probably 1930's by the look of it, and the top half of the
dial is printed in black text, and the bottom in red. I've just noticed
the the bottom half has disappeared! If you look at it from an oblique
angle, you can see the print, but it has faded to nothing!. The device
is in a really dark nook, getting no natural light, and for at least the
last 5 years the area is lit 24/7 by a lamp on a bureau - some 18" away
(Philips compact fluorescent for the last 3 years or so). The lamp has a
fabric shade, and the barometer's dial has a glass cover. It's not
something that I look at in detail every day - I've got the internet for
the weather ;-), but I know that I calibrated it a couple of years ago &
didn't notice any problem..
Any insight?
Cheers, Bramblestick
Others have mentioned UV, but some red inks as found in hand drawn maps,
legal documents, etc. fade faster than the black even in the absence of
light. Probably oxidation.
I printed some inkjet decals and left em on a window sill half obscured
by an ornament.

In the shade they stayed red. In sunlight with UV they were wiped out
red wise.

Its something in *that particular red dye.- Hide quoted text -

- Show quoted text -

I seem to remember that just about all the bright red pigments and
dyes that you could make reasonably inexpensive paints and printing
inks from were prone to fading in light, or chemically by reacting
with air, or toxic - or some combination of the three, although this
may have improved in recent years. On the other hand, carbon black was
(and is) commonly used as the pigment in black paints and printing
inks, and is very stable, as are various black, brown and yellow
pigments based on Iron oxide. I've seen lots of dials where red
printing has faded while the black is as good as new, even when they
were only in indirect sunshine - so a fluorescent lamp only 18 inches
away could possibly have the same effect.

Reds are notorious for UV fading.

Especially organic pigments.

http://www.paintmaking.com/red.htm

Its no bad idea to put a UV barrier lacquer over reds..apparently.

You can buy UV filtering glass, which I have put on a couple of water
colours that I mind about.

Jonathan

On 09/01/2012 22:48, Newshound wrote:
On 08/01/2012 21:03, Bramblestick wrote:
Just noticed this strange thing!

For the last 12 years, we've had an aneroid barometer hanging in the
hall - it's probably 1930's by the look of it, and the top half of the
dial is printed in black text, and the bottom in red. I've just noticed
the the bottom half has disappeared! If you look at it from an oblique
angle, you can see the print, but it has faded to nothing!. The device
is in a really dark nook, getting no natural light, and for at least the
last 5 years the area is lit 24/7 by a lamp on a bureau - some 18" away
(Philips compact fluorescent for the last 3 years or so). The lamp has a
fabric shade, and the barometer's dial has a glass cover. It's not
something that I look at in detail every day - I've got the internet for
the weather ;-), but I know that I calibrated it a couple of years ago &
didn't notice any problem..

Any insight?

Cheers, Bramblestick

Others have mentioned UV, but some red inks as found in hand drawn maps,
legal documents, etc. fade faster than the black even in the absence of
light. Probably oxidation.


Thanks everyone. I'm going for the UV from the CF - will look into that
in greater detail. It's a pity, however.

Cheers,
Bramblestick

Bramblestick wrote:
On 09/01/2012 22:48, Newshound wrote:
On 08/01/2012 21:03, Bramblestick wrote:
Just noticed this strange thing!

For the last 12 years, we've had an aneroid barometer hanging in the
hall - it's probably 1930's by the look of it, and the top half of the
dial is printed in black text, and the bottom in red. I've just noticed
the the bottom half has disappeared! If you look at it from an oblique
angle, you can see the print, but it has faded to nothing!. The device
is in a really dark nook, getting no natural light, and for at least the
last 5 years the area is lit 24/7 by a lamp on a bureau - some 18" away
(Philips compact fluorescent for the last 3 years or so). The lamp has a
fabric shade, and the barometer's dial has a glass cover. It's not
something that I look at in detail every day - I've got the internet for
the weather ;-), but I know that I calibrated it a couple of years ago &
didn't notice any problem..

Any insight?

Cheers, Bramblestick

Others have mentioned UV, but some red inks as found in hand drawn maps,
legal documents, etc. fade faster than the black even in the absence of
light. Probably oxidation.


Thanks everyone. I'm going for the UV from the CF - will look into that
in greater detail. It's a pity, however.


it is for sure.

it may be possible to resurrect it but I would not know how.


Cheers,
Bramblestick